s1_goto_dir(){
	cd "$1"
}

s2_touch_empty_file_with_given_name(){
	touch "$1"
}

s3_make_directories(){
	mkdir -p projects/git projects/backup
}

s4_create_6_files(){
	(cd projects && touch linux1_centos linux_redhat linux1_c_programming linux2_centos linux2_redhat linux2_c_programming)
}

s5_make_directories_in_git(){
	mkdir -p projects/git/linux1 projects/git/linux2
}

s6_move_files_to_dir_1_or_2(){
	mv projects/linux1_* projects/git/linux1/
	mv projects/linux2_* projects/git/linux2/
}

s7_create_package_and_compress(){
	(cd projects && tar -czvf backup/git.tar.gz git)
}

s8_delete_dir_git(){
	rm -rf projects/git
}

s9_recover_from_git_tar_gz_backup(){
	(cd projects && tar-xzvf backup/git.tar.gz)
}

s10_create_package_and_compress(){
	(cd projects && tar -jcvf backup/git.tar.bz2 git)
}

s11_find_and_sort_alphabetically_all_created_files_and_dirs(){
	find ./projects -print | sort
}

s12_get_next_15_minute_bundary(){
	date -d "@$(( ($(date  +%s) /900 + 1) * 900 ))" "+%Y-%m-%d_%H:%M:%S"
}

